Improvement in springs for relay-magnets



@uiten tu'tr gutent @ffice WILLIAM N. MCINNIS, OF NORTHUMBERLAND, PENNSYLVANIA.

Letters Patent Ifo. 'i4-,925, dated February 25, 1868.

- IMPROVEMENT IN SPRINGS FOB. RELAY-MAGNETS.

@he tlnhulc numb tu in tlgrsc g'lrttus hnelt mit linking mrt nf its smite.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, WILLIAA N. McINNIs, of the town of Northumberland, county of Northumberland, and State of Pennsylvania, have invented Improvements in Electro-Magnetic Telegraphs, which I style the Winding-Spring Telegraph-Relay Adjnsterf and I do hereby declare the following to be an exact description thereofgreference being had to the accompanying drawings, and to the letters of reference marked thereon, making a part of this specification, in which- Figure 1 represents a side elevation of the machine.

Figure 2 Aa. front view.

A represents the winding-wheel; B, the wheel-axle; D, the wheel-stand;A E, the adjusting-screw; F, the

, screw-supporter; G,the relay-armature; II, the relay-frame; I, the relay-magnets; all of which are well-known derices belonging to electro-magnetic telegraphs.

The nature of my invention consists in the construction and attachment of a single or double irregularlycoiled steel spring, C, to the axle B (of the hiding-wheel A) and to the relay-armature G, for the purpose of giving the extremes vof elasticity and freedom to the armature G, imparting thc most perfect ineness of adjustment, with strengthland durability. One or more dat steel springs, C, are attached at each end to the axle B,

as shown at J, and at theother end, us shown at L. They are then wound in a loose, irregular coil around the axle B, and toward the centre of the axle, where the two ends are joined permanently together, forming a tapering loosely-coiled spring, C, from where it enters the axle to the widest extremity, at`M, where it is connected,

by Wire or otherwise, to the armature G, and by turning the adjusting-screw E the wheel A is turned, which will wind up spring C, giving the extremes of elasticity and freedom to the .armature G. Thus the neness of adjustment given by this-winding-spring C .supplies a want long felt in telegraphing, and lines ca n be worked with this attachment that cannot be used at all with the common adjuster. Owing to the scope of elasticity possessed by this winding-spring C, it gives te tho relay-armature a capacity for {inencss of adjustment, corubined 'with all necessary strength, hitherto unknown, in eonsequeneethereof dispensing with the necessity of having main batteries of over half the strength of those new in use, thereby causing a saving of at least onehalf the battery-material used atpresent. 'Ihe diliculties now experienced in tclegraphng are completely overcome, such as .escn-pos, bad weather, or imperfect insulation; and numerous accidental and natural obstructions, that render the present system of adjustment useless, or work so hard ns to be nearly so, can, with my adjuster, be worked with perfect ease and prevent the new experienced and numerous delays in the transmission of messages. This adjuster also retains its adjnstivc powers, so that oiiicers will hear their respective calls, no matter what the difference may be in the electric currentnt each ofcc.

What I claim as my invention, and desire to secure by Letters Patent, is- Y The construction of theirregularly and loosely-coiled steel spring C, when attached to and combined with the winding-axle B and the armature G, as herein described and for the purposes set forth.

WM. N. McINNIS. Witnesses:

J. RUnNuLr., C.' F.Lrrrr.n. 

